Backlight Module Holding Device for Lamp Stability
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Solution Overview
Problem
Large liquid crystal display backlight modules face issues with long lamps bending and susceptibility to breakage, leading to impaired light quality due to the white-dot phenomenon when lamps touch the light guide plate.
Innovation Solution
A holding device with a U-shaped fixing portion and holding arms that engage with a reflector's fixing hole to securely position lamps, preventing bending and shock-induced damage by buffering them and maintaining a predetermined distance from the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If long lamps are used in large liquid crystal displays, then the display size is increased, but the lamps become liable to bend and break
Solution Approach 1:
The holding device divides the lamp support function into multiple components: a holding portion that contacts the lamp, a fixing portion that attaches to the reflector, and buffering portions that provide shock absorption. This segmentation allows each component to be optimized for its specific function, improving overall lamp reliability without reducing length.
Solution Approach 2:
The holding device includes buffering portions positioned between the lamp and the reflector that provide shock absorption in advance. These buffering portions prevent direct transmission of shocks to the lamp, reducing the likelihood of breakage before damage occurs.
2Area of stationary object
If long lamps are used, then the display area is increased, but the lamps are susceptible to shock-induced breakage
Solution Approach 1:
The buffering portions are integrated into the holding device structure, positioned to absorb shocks before they reach the lamp. This prior cushioning protection reduces shock susceptibility while maintaining the long lamp configuration needed for large display areas.
Solution Approach 2:
The holding device acts as an intermediary between the reflector and the lamp, introducing buffering portions that mediate the transmission of shocks. This intermediary structure protects the lamp from direct shock exposure while allowing the lamp to remain in position for large display coverage.
3Power
If lamps are positioned close to the light guide plate, then the light output efficiency is improved, but the white-dot phenomenon occurs when lamps bend and touch the light guide plate
Solution Approach 1:
The holding device applies preliminary anti-action by restraining the lamp at a predetermined distance from the light guide plate through the holding portion. This preventive positioning stops the lamp from bending toward the light guide plate, eliminating the white-dot phenomenon while maintaining optimal light output efficiency.
Solution Approach 2:
The holding device provides dynamic restraint by allowing the lamp to maintain a predetermined distance from the light guide plate while preventing excessive bending. This dynamic positioning ensures the lamp stays in the optimal position for light output without contacting the light guide plate.
Data Source
AI summary
An exemplary backlight module (20) includes a light source (23), a light guide plate (21), a light source reflector (22), and a holding device (24). The light guide plate includes a light incident surface (211). The light source is disposed adjacent to the light incident surface. The light source reflector attaches to the light guide plate, and includes a fixing hole (224). The holding device engages with the light source reflector at the fixing hole and restrains the light source in position a predetermined maximum distance away from the light source reflector.